Removing The Indoor Electronic Control P.c. Board And Thermistor; Removing Indoor Power Pc Board/Indoor Terminal Pc Board/Electrical Box - Mitsubishi Electric MSZ-GE09NA Service Manual

OPERATING PROCEDURE
2. Removing the indoor electronic control P.C.
board and the room temperature thermistor
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the screw of the V.A. clamp and the V.A.
clamp.
(3) Loosen the screw of the indoor/outdoor connecting
wire and remove the indoor/outdoor connecting wire.
(4) Remove the screw of the electrical cover and the
electrical cover.
(5) Open the indoor electronic control P.C. board holder (to
right side)
(6) Disconnect the following connectors:
<Indoor electronic control P.C. board>
CN112 (Indoor coil thermistor)
CN151 (Vane motor)
CN10A (To the indoor power P.C. board)
(7) Unhook the catches of the indoor electronic control
P.C. board holder from the nozzle and the electrical
box (right side).
(8) Remove the indoor electronic control P.C. board hold-
er from the conduit cover.
(9) Remove the room temperature thermistor from the
hook of the indoor electronic control P.C. board hold-
er.
(10) Open the back side of the indoor electronic control P.C.
board holder, and remove the indoor electronic con-
trol P.C. board.
(11) Remove the room temperature thermistor from the
indoor electronic control P.C. board.
3. Removing the indoor power P.C. board, the
indoor terminal P.C. board, and the electrical
box
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the indoor/outdoor connecting wire and the
indoor electric control P.C. board holder. (Refer to 2
(2)-(8).).
(3) Remove the screw of the conduit cover and the con-
duit cover.
(4) Remove the screw of the conduit plate and the con-
duit plate.
(5) Remove the ground wire connected to the indoor heat
exchanger from the electrical box.
(6) Remove the screw fixing the electrical box.
(7) Unhook first the lower, then the upper catches of the
electrical box, and pull out the electrical box.
(8) Disconnect all the connectors on the indoor power P.C.
board and unhook all lead wires.
(9) Remove the screw of terminal block on the indoor ter-
minal P.C. board.
(10) Remove the indoor power P.C. board and the indoor
terminal P.C. board.
OBH548D
Photo 2
Ground wire
Catch of indoor electronic
control P.C. board holder
Photo 3
Indoor terminal
P.C. board
Terminal block
Catch of indoor electronic
control P.C. board holder
Photo 4
41
PHOTOS
Electrical box
Screw of the
electrical cover
Screw of the
V.A. clamp
Indoor electronic
control
P.C. board holder
Upper catch
Indoor power
P.C. board
Lower catch
Screws of the
conduit plate
Screw of the
conduit cover
Screw of the
electrical box